Mechanics

CYLINDER 1 AND 4 MISFIRES AND LOSS OF POWER

2003 Volkswagen Golf • 75,000 miles

My car misfires whenever it warms up. I get the following fault codes
16685: Cylinder 1 misfire
16688: Cylinder 4 misfire
16684: Random/Multiple misfire
16825: Evaporative Emission System incorrect purge flow.

It loses power and regains as you drive on.
Avatar
Andrewmwicigi
September 17, 2012.




These vehicles are really prone to coil failures. I would swap the coils to cylinders 2 and 3 and see if the miss follows.

ALLPRO
Sep 17, 2012.
Thanks. I have renewed all 4 coils and still experience the same problem. When the misfire occurs, I realised that the fuel injectors 1 and 4 do not have electrical pulses. Immediately I clear the fault codes, power on the connectors resumes and thereafter disappears. The engine is also very hot then but have no temperature sensor faults. Could my ECU?
AD

Tiny
Andrewmwicigi
Sep 18, 2012.
It sounds alot like a computer problem.

The injector driver in the ecm might be faulty.

ALLPRO
Sep 18, 2012.

AD